put a washer between the tongs and on both sides and screw the nut on Step 3: Make the Grips also cut out two small rectangles use the grinder to put grooves in them weld them on the tongs (make sure that when the tongs are closed the grips are flat against each other)...
This was bugging me all day. If it has or happened to you, you know the feeling, and when you're done you can relax. At least until you have to make a new housing for it. Which is a different Instructable almost entirely.